It probably wasn’t an international terrorist group. So say Thai authorities investigating Monday’s deadly bombing at a shrine in central Bangkok. But police are looking for at least 10 people they believe planned the attack that claimed 20 lives. Officials say the “blast was made by teams” from a network within Thailand. Two suspects caught on camera have turned themselves in, saying they’re tour guides and had nothing to do with the explosion, but investigators are scouring the city for others and have asked Interpol for help in finding the culprits.